DRV8231/A 33 V H-Bridge Motor Drivers from Texas Instruments
March 14, 2022
Texas Instruments’ DRV8231 and DRV8231A are integrated motor drivers with an N-channel H-bridge, charge pump, current regulation, and protection circuitry. The charge pump improves efficiency by supporting N-channel MOSFET half-bridges and 100% duty-cycle driving. The DRV8231/A implements a current regulation feature by comparing the analog input VREF and the voltage across a current-sense shunt resistor on the ISEN pin. The ability to limit current can significantly reduce large currents during motor startup and stall conditions.
A low-power sleep mode achieves ultra-low quiescent current draw by shutting down most of the internal circuitry. Internal protection features include supply undervoltage lockout (UVLO), output overcurrent protection (OCP), and device overtemperature shutdown (TSD). The DRV8231 comes in pin-to-pin, scalable RDS(ON), and supply voltage options to support various loads and supply rails with minimal design changes.
- •N-channel H-bridge brushed DC motor driver
- •Operating supply voltage range: 4.5 V to 33 V
- •Pin-to-pin, RDS(ON), voltage, and current sense/regulation variants (external shunt resistor and an integrated current mirror):
- •DRV8231: 4.5 V to 33 V, 600 mΩ, shunt
- •DRV8231A: 4.5 V to 33 V, 600 mΩ, mirror
- •High output current capability: 3.7 A peak
- •PWM control interface
- •Logic inputs: 1.8 V, 3.3 V, and 5 V
- •Integrated IPROPI current sensing for stall detection and current regulation
- •Low-power sleep mode: <1 µA at VVM = 24 V, TJ = +25°C
- •Small package and footprint:
- •8-pin WSON with a PowerPAD™, 2.0 mm x 2.0 mm
- •8-pin HSOP with a PowerPAD, 4.9 mm x 6.0 mm
- •Integrated protection: VM UVLO, auto-retry OCP, and TSD
- •Automated teller machines (ATMs)
- •Ventilators
- •Surgical equipment
- •Electronic hospital beds and bed controls
- •Fitness machines
- •Printers
- •Vacuum robots
- •Washers and dryers
- •Coffee machines
- •POS printers
- •Electricity meters
To learn more about the Bridge Motor Drivers, click here
